A summary of what we know about Delta so far 7th sept 2021, scientifically:

- Vaccines
Vaccinated people are sick for less time and less severely + less time infectious
Moderna offers the best protection with +80% protection: so less than 20% still gets sick Pfizer offers about 70% protection, but protection decreases over time, especially in people over 60: in Israel, 60% of people in the hospital are now fully vaccinated
Many countries give 3rd Pfizer shot after 5 months, there is even talk of a 4th shot in Israel.